मुझे क्यों मिलता है: "मानों की लंबाई अनुक्रमणिका की लंबाई से मेल नहीं खाती" त्रुटि?

मेरे पास निम्न कोड है और मैं एक नए कॉलम में True असाइन करने का प्रयास कर रहा हूं जहां वास्तविक तिथि कॉलम 'डी' (बनाई गई तिथि) और False की तारीख के बराबर है।

मैं पाइथन के लिए काफी नया हूं इसलिए मैं समझना चाहता हूं कि मैंने क्या गलत किया है:

def GetData():
    myList = GetFileList(TodaysDate,5)
    NewDataFrame  = pd.DataFrame()
    for x in myList:
        #The date of the actuals data is the day BEFORE it was created  
        ActualDate = getDate(x) - timedelta(days=1)

        myTempData = pd.read_csv(WSIWeatherDir + "\\" + x, parse_dates = [" date"], date_parser = DateTimeParser)

        myTempData = myTempData.replace(-99,np.nan)
        myTempData = myTempData.loc[myTempData['name'].isin(NL_WeatherStations)]
        myTempData['D'] = myTempData[' date'].dt.date

        #MyData = myTempData.sort([' date'], ascending=True)
        #print MyData

        #Select indices of the weather file where the column " date" is equal to the actual date we are looking for
        MyActualIndex = myTempData['D'] == ActualDate
        MyActualData = myTempData[MyActualIndex]


        MyExpectedIndex = myTempData.index.difference(MyActualData.index)
        MyExpectedData =  myTempData.loc[MyExpectedIndex] 

        myTempData ['Actuals'] = [True] * len(MyActualData.index)
        myTempData ['Actuals'] = [False] * len(MyExpectedData.index)

        NewDataFrame = pd.concat([NewDataFrame,myTempData])
    return NewDataFrame
print GetData()

त्रुटि

runfile('C:/Users//Desktop/NLG_TAC_Calculation/TAC_2.py', wdir='C:/Users//Desktop/NLG_TAC_Calculation')
Traceback (most recent call last):

  File "<ipython-input-4-c9c151bca95a>", line 1, in <module>
    runfile('C:/Users//Desktop/NLG_TAC_Calculation/TAC_2.py', wdir='C:/Users//Desktop/NLG_TAC_Calculation')

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 685, in runfile
    execfile(filename, namespace)

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 71, in execfile
    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "C:/Users//Desktop/NLG_TAC_Calculation/TAC_2.py", line 117, in <module>
    print GetData()

  File "C:/Users//Desktop/NLG_TAC_Calculation/TAC_2.py", line 108, in GetData
    myTempData ['Actuals'] = [True] * len(MyActualData.index)

  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 2127, in __setitem__
    self._set_item(key, value)

  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 2204, in _set_item
    value = self._sanitize_column(key, value)

  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 2362, in _sanitize_column
    value = _sanitize_index(value, self.index, copy=False)

  File "C:\Python27\lib\site-packages\pandas\core\series.py", line 2579, in _sanitize_index
    raise ValueError('Length of values does not match length of '

ValueError: Length of values does not match length of index